Multifunctional air door suitable for passing under mine

Abstract

The utility model relates to the technical field of coal mines, in particular to a multifunctional air door suitable for passing under a mine, which comprises an air door body, an air door wall body used for installing the air door body and connected with a roadway wall body, and a passing door body installed on one side of the air door body and capable of moving on the air door body. The passing door body comprises a main door body, pulley blocks installed at the upper end and the lower end of the main door body respectively, a door handle installed at the left side end of the front end face of the main door body, and an adjustable auxiliary door installed in the middle of the main door body. The technical problem of integrating rapid passing of personnel and air volume adjustment is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mine, specifically, relates to the multi -functional air door of being suitable for passing under mine. BACKGROUND

[0002] Effective ventilation in the coal mine is the important measure of guaranteeing the safety of workers and realizing safe production, and the poor ventilation condition of the coal mine is prone to cause safety accidents such as gas explosion, and even cause mine disaster.

[0003] And the air door is the most common and most important ventilation facility in the ventilation system under the coal mine, and most of the air doors under the coal mine at present are all opened when needing to pass, and the opening and closing time is slow after the air door is opened, and the air door needs to be opened every time whether it is a person or vehicle passing, and it is more troublesome, therefore it is necessary to design a passing door that is convenient to open when a pedestrian passes.

[0004] And with the change of production progress and production condition, the ventilation quantity of each part in the ventilation system needs to be dispatched and adjusted, and the adjustment is frequent, and the most used facility for adjusting the air volume is the adjustment air window, that is, the cross section size of the ventilation window is changed to realize the adjustment of the ventilation quantity, and the rotatable joint leaf is arranged on the passing door, that is, the function of the adjustment air window is realized, so that the passing and the adjustment of the air volume can be combined together, and it is not necessary to additionally design the adjustment air window to adjust the air volume. UTILITARIAN CONTENT

[0005] The utility model aims at providing the multi -functional air door of being suitable for passing under mine to solve the technical problem that personnel fast passing and adjusting air volume are combined.

[0006] The multi -functional air door of being suitable for passing under mine of the utility model is realized as follows:

[0007] The multi -functional air door of being suitable for passing under mine, including the air door body, the air door wall body for installing the air door body and being connected with the roadway wall, and the passing door body installed on one side air door body and can move on the air door body;

[0008] The passing door body includes the main door body, the pulley block set installed on the upper end and the lower end of the main door body, the door handle installed on the left end of the front end face of the main door body, and the adjustable auxiliary door installed on the middle part of the main door body.

[0009] As an optional embodiment, the air door frame is installed in the air door wall body cavity;The air door body is rotatably installed on the air door frame;

[0010] The door body comprises a left door body and a right door body, and a starting air cylinder is installed between the inner upper end of the left door body and the right door body and the side end close to the inner side of the door body of the lower end of the door frame;

[0011] One end of the air cylinder is hinged to the door frame, and the other end is hinged to the inner upper end of the left door body or the right door body;

[0012] The lower right end of the left door body and the lower left end of the right door body are both installed with a mobile wheel arranged in the ground.

[0013] As an optional embodiment, the lower end of the left door body and the right door body is provided with a windscreen, and the upper end of the left door body and the right door body is also provided with a windscreen;

[0014] The upper right side of the left door body is installed with a magnetic attraction arresting member corresponding to the door handle.

[0015] As an optional embodiment, a square through hole for installing the main door body is formed in the middle of the left door body, and a square groove is formed inwardly on the left side of the square through hole on the left door body;

[0016] The width of the square groove is just suitable for accommodating the main door body;

[0017] The upper end and the lower end of the square through hole and the square groove on the left door body are both provided with a pulley groove suitable for rolling of the pulley block.

[0018] As an optional embodiment, the main door body is a frame structure; an elastic sealing strip is installed on the left side of the main door body;

[0019] The adjustable secondary door comprises a first secondary door installed at the front end of the main door body and a second secondary door installed at the rear end of the main door body.

[0020] As an optional embodiment, a plurality of upper cylindrical holes are formed in the upper end surface of the inner cavity of the main door body in the transverse direction;

[0021] A plurality of lower cylindrical holes corresponding to the upper cylindrical holes are formed in the lower end surface of the inner cavity of the main door body in the transverse direction.

[0022] As an optional embodiment, the first secondary door comprises a plurality of first rotating leaves respectively inserted between a plurality of the upper cylindrical holes and corresponding lower cylindrical holes in the same horizontal row;

[0023] The second secondary door comprises a plurality of second rotating leaves respectively inserted between a plurality of the upper cylindrical holes and corresponding lower cylindrical holes in another horizontal row.

[0024] As an optional embodiment, the first rotating blade includes a first rotating shaft inserted between the upper cylindrical hole and the lower cylindrical hole, a first bearing respectively sleeved on the upper end and the lower end of the first rotating shaft, a first rotating gear sleeved on the upper end of the first rotating shaft and below the first bearing, and a first blade sleeved on the middle part of the first rotating shaft;

[0025] The second rotating blade includes a second rotating shaft inserted between the upper cylindrical hole and the lower cylindrical hole, a second bearing respectively sleeved on the upper end and the lower end of the second rotating shaft, a second rotating gear sleeved on the upper end of the second rotating shaft and below the second bearing, and a second blade sleeved on the middle part of the second rotating shaft; wherein

[0026] The first rotating gear is above the second rotating gear; adjacent two first rotating gears are connected in meshing, and adjacent two second rotating gears are connected in meshing;

[0027] The upper and lower first bearings and the second bearings are respectively installed in the upper cylindrical hole and the lower cylindrical hole.

[0028] As an optional embodiment, the upper end of the first sub-door is provided with a first upper cover for covering the first rotating gear and adapted to cooperate with the upper end of the front part of the inner cavity of the main door body;

[0029] The upper end of the second sub-door is provided with a second upper cover for covering the second rotating gear and adapted to cooperate with the upper end of the rear part of the inner cavity of the main door body;

[0030] The first upper cover is of a “[” shape, a first fixed rod is fixedly installed on one side of the cavity formed on the two side wings of the first upper cover, a first driving bearing is installed on the middle part of the first fixed rod, a first driving gear is installed on the first driving bearing and engaged with the first rotating gear, and a first opening is formed in the middle part of the front end of the first upper cover for exposing the first driving gear;

[0031] The second upper cover is of a “[” shape, a second fixed rod is fixedly installed on one side of the cavity formed on the two side wings of the second upper cover, a second driving bearing is installed on the middle part of the second fixed rod, a second driving gear is installed on the second driving bearing and engaged with the second rotating gear, and a second opening is formed in the middle part of the front end of the second upper cover for exposing the second driving gear;

[0032] Soft sealing strips are installed on the edges of the first opening and the second opening.

[0033] As an optional embodiment, an elastic connecting body adapted to be put into the square groove is installed on the left side of the main door body.

[0034] Compared with the prior art, the utility model has the following beneficial effects: the pass door body that the utility model adopts, through the pulley set that sets up on the upper end and lower end of main door body, make pass door body can slide on left door body, when have pedestrian need to pass, only need to remove pass door body, do not need to open whole cumbersome air door, make pass become convenient.

[0035] Adjustable side door is arranged on the pass door body, so that the pass door body has the function of adjusting the fan, and two adjustable side doors are arranged on the front and back of the main door body in the utility model, the adjustment of air volume is more accurate, and two direction rotating leaves are arranged on a side door, the resistance when the air passes through can be increased, so that the range of air volume adjustment is larger. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is overall structure schematic diagram of the multifunctional air door suitable for passing under the mine in the embodiment;

[0037] Figure 2 It is top view structure diagram of the multifunctional air door suitable for passing under the mine in the embodiment;

[0038] Figure 3 It is the schematic diagram of pass door body after being received in square groove of the multifunctional air door suitable for passing under the mine in the embodiment;

[0039] Figure 4 It is side view of the main door body in the embodiment;

[0040] Figure 5 It is structure diagram of the second side door in the embodiment;

[0041] Figure 6 It is front view structure diagram of the main door body in the embodiment;

[0042] Figure 7 It is the enlarged view of A in the embodiment Figure 6

[0043] Figure 8 It is the inner chamber of the main door body in the embodiment;

[0044] Figure 9 It is the right view sectional view of the pass door body upper end in the embodiment;

[0045] Figure 10 It is the top view of the first side door and the second side door leaf opening after the pass door head in the embodiment.

[0046] ​In the figure: the door body 100, the left door body 110, the square groove 111, the right door body 120, the starting cylinder 130, the air baffle 140, the air door wall body 200, the air door door frame 210, the passing door body 300, the main door body 310, the elastic sealing strip 311, the elastic connecting body 312, the pulley block 313, the door handle 314, the upper cylindrical hole 315, the adjustable auxiliary door 320, the first rotating leaf 321, the first rotating shaft 3211, the first bearing 3212, the first rotating gear 3213, the first leaf 3214, the second rotating leaf 322, the second rotating shaft 3221, the second bearing 3222, the second rotating gear 3223, the second leaf 3224, the first upper cover 323, the first fixed rod 3231, the first driving bearing 3232, the first driving gear 3233, the first opening 3234, the second upper cover 324, the second fixed rod 3241, the second driving bearing 3242, the second driving gear 3243, the second opening 3244, the air pressure sensor 410, the air pressure value display 420. DETAILED DESCRIPTION

[0047] The utility model will be explained in further detail now in combination with the drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the utility model in a schematic way, so they only show the structure related to the utility model.

[0048] Example 1:

[0049] Referring to Figures 1 to 10 As shown in the figure, the multifunctional air door suitable for passing under a mine comprises an air door body 100, an air door wall body 200 for installing the air door body 100 and connected with a roadway wall body, and a passing door body 300 installed on one side of the air door body 100 and movable on the air door body 100.

[0050] Referring to Figure 3 and Figure 6 As shown in the figure, the passing door body 300 comprises a main door body 310, pulley blocks 313 installed on the upper end and the lower end of the main door body 310 respectively, a door handle 314 installed on the left end of the front end face of the main door body 310, and an adjustable auxiliary door 320 installed on the middle part of the main door body 310.

[0051] Preferably, referring to Figure 1 As shown in the figure, an air door door frame 210 is installed in the inner cavity of the air door wall body 200; and the air door body 100 is rotatably installed on the air door door frame 210.

[0052] The air door wall body 200 is connected with the wall body of a roadway where the air door needs to be installed, so as to improve the compression resistance and deformation resistance of the air door.

[0053] Referring to Figure 2As shown, the damper door body 100 comprises a left door body 110 and a right door body 120, and a starting air cylinder 130 is installed between the upper inner end of the left door body 110 and the right door body 120 and the lower end of the damper door frame 210 close to the one side end of the inner side of the damper door body 100.

[0054] One end of the starting air cylinder 130 is hinged to the damper door frame 210, and the other end is hinged to the upper inner end of the left door body 110 or the right door body 120.

[0055] The lower right end of the left door body 110 and the lower left end of the right door body 120 are both installed with a mobile wheel arranged in the ground.

[0056] Optionally, the mobile wheel can be an electric wheel, but is not limited to. The electric wheel can be linked with the underground row car function, that is, when the row car reaches the damper, the damper is automatically opened.

[0057] Preferably, the lower end of the left door body 110 and the right door body 120 is provided with a wind screen 140, and the upper end of the left door body 110 and the right door body 120 is also provided with a wind screen 140. The wind screen 140 can effectively seal the damper.

[0058] The right side of the left door body 110 close to the side of the main door body 310 is installed with a magnetic attraction arresting member corresponding to the door handle 314.

[0059] When opening the access door body 300, push the door handle 314, and separate the door handle 314 from the magnetic attraction arresting member, release the restriction on the door handle 314, and then push the access door body 300 to open the door. When closing the door, push the access door body 300 to close, so that the door handle 314 returns to the original position and is attracted and fixed to the magnetic attraction arresting member and the access door body 300.

[0060] Preferably, referring to Figure 1 and Figure 3 As shown, a square through hole for installing the main door body 310 is formed in the middle of the left door body 110, and a square groove 111 is formed inwardly on the left side of the square through hole of the left door body 110.

[0061] Referring to Figure 5 and Figure 6 As shown, the adjustable auxiliary door 320 comprises a first auxiliary door installed at the front end of the main door body 310, and a second auxiliary door installed at the rear end of the main door body 310.

[0062] The width of the square slot 111 is just enough to accommodate the main door body 310. So that the main door body 310 can be accommodated into the cavity of the square slot 111 when moving. The width of the square slot 111 is greater than the width of the passage door body 300, and after the first leaf 3214 and the second leaf 3224 of the first secondary door and the second secondary door are opened, the square slot 111 will not affect the first leaf 3214 and the second leaf 3224 after being opened when pushing the passage door body 300.

[0063] The left door body 110 is provided with a pulley groove at the upper end and the lower end of the square hole and the square slot 111, which is suitable for the rolling of the pulley set 313.

[0064] The upper end and the lower end of the main door body 310 are provided with a sliding groove, and the pulley set 313 is accommodated into the cavity formed by the pulley groove and the sliding groove, so that the pulley set 313 will not fall off, and the passage door body 300 can move smoothly.

[0065] Optionally, referring to Figure 5 The main door body 310 is a frame structure, and the left side of the main door body 310 is provided with an elastic sealing strip 311. The left side of the main door body 310 is sealed by the elastic sealing strip 311, so that the passage door body 300 and the left door body 110 are completely closed after the passage door body 300 is closed, and no air leakage occurs.

[0066] Optionally, the edges of the upper end and the lower end of the main door body 310 are provided with sealing strips, which can seal the passage door body 300 and prevent coal ash and dust from falling into the sliding groove and the pulley groove, affecting the sliding effect of the pulley set 313.

[0067] Optionally, the elastic sealing strip 311 can be made of soft materials such as rubber, silicone, and sponge, but is not limited thereto.

[0068] Preferably, the inner cavity of the main door body 310 is provided with two rows of upper cylindrical holes 315 arranged in a staggered manner in the transverse direction of the upper end surface.

[0069] The lower end surface of the inner cavity of the main door body 310 is provided with two rows of lower cylindrical holes corresponding to the upper cylindrical holes 315 in the transverse direction.

[0070] Preferably, the first secondary door includes a plurality of first rotating leaves 321 respectively inserted between a plurality of upper cylindrical holes 315 and corresponding lower cylindrical holes in the same horizontal row.

[0071] The second secondary door includes a plurality of second rotating leaves 322 respectively inserted between a plurality of upper cylindrical holes 315 and corresponding lower cylindrical holes in another horizontal row.

[0072] Preferably, the first rotating blade 321 comprises a first rotating shaft 3211 inserted between the upper cylindrical hole 315 and the lower cylindrical hole, a first bearing 3212 respectively sleeved on the upper end and the lower end of the first rotating shaft 3211, a first rotating gear 3213 sleeved on the upper end of the first rotating shaft 3211 and located below the first bearing 3212, and a first blade 3214 sleeved on the middle part of the first rotating shaft 3211.

[0073] The second rotating blade 322 comprises a second rotating shaft 3221 inserted between the upper cylindrical hole 315 and the lower cylindrical hole, a second bearing 3222 respectively sleeved on the upper end and the lower end of the second rotating shaft 3221, a second rotating gear 3223 sleeved on the upper end of the second rotating shaft 3221 and located below the second bearing 3222, and a second blade 3224 sleeved on the middle part of the second rotating shaft 3221.

[0074] The first rotating gear 3213 is located above the second rotating gear 3223; adjacent two first rotating gears 3213 are connected in meshing, and adjacent two second rotating gears 3223 are connected in meshing.

[0075] Referring to Figure 8 As shown in the drawings, since the upper cylindrical hole 315 and the lower cylindrical hole are both arranged in two rows in a staggered manner, the first rotating shaft 3211 and the second rotating shaft 3221 arranged between the upper cylindrical hole 315 and the lower cylindrical hole do not interfere with each other, and the first rotating gear 3213 and the second rotating gear 3223 installed on the first rotating shaft 3211 and the second rotating shaft 3221 also do not interfere with each other.

[0076] The upper and lower first bearings 3212 and the second bearings 3222 are respectively installed in the upper cylindrical hole 315 and the lower cylindrical hole.

[0077] Preferably, referring to Figure 8 and Figure 9 As shown in the drawings, the upper end of the first auxiliary door is provided with a first upper cover 323 for covering the first rotating gear 3213 and adapted to cooperate with the upper end of the front part of the inner cavity of the main door body 310.

[0078] The upper end of the second auxiliary door is provided with a second upper cover 324 for covering the second rotating gear 3223 and adapted to cooperate with the upper end of the rear part of the inner cavity of the main door body 310.

[0079] The first upper cover 323 is in the shape of "[", and a first fixed rod 3231 is fixedly installed on one side of the cavity formed on the two side wings of the first upper cover 323, a first driving bearing 3232 is installed in the middle of the first fixed rod 3231, and a first driving gear 3233 engaged with the first rotating gear 3213 is installed on the first driving bearing 3232; the first opening 3234 exposed by the first driving gear 3233 is arranged in the middle of the front end of the first upper cover 323.

[0080] The second upper cover 324 is in the shape of "[", and a second fixed rod 3241 is fixedly installed on one side of the cavity formed on the two side wings of the second upper cover 324, a second driving bearing 3242 is installed in the middle of the second fixed rod 3241, and a second driving gear 3243 engaged with the second rotating gear 3223 is installed on the second driving bearing 3242; the second opening 3244 for exposing the second driving gear 3243 is arranged in the middle of the front end of the second upper cover 324.

[0081] The rotation of the first driving gear 3233 and the second driving gear 3243 can realize the rotation of the first rotating gear 3213 and the second rotating gear 3223, thereby driving the first leaf 3214 and the second leaf 3224 to rotate.

[0082] Referring to Figure 10 Since the two adjacent first rotating gears 3213 are engaged with each other, when the first rotating gear 3213 is driven to rotate by the first driving gear 3233, the rotation directions of the two adjacent first rotating gears 3213 are opposite, so that the rotation directions of the two adjacent first leaves 3214 are opposite, thereby realizing that the wind entering the first leaf 3214 is blocked in two directions, the wind amount passing through is adjusted, and the size of the opening of the first leaf 3214 can also adjust the wind amount passing through.

[0083] Similarly, since the two adjacent second rotating gears 3223 are engaged with each other, when the second rotating gear 3223 is driven to rotate by the second driving gear 3243, the rotation directions of the two adjacent second rotating gears 3223 are opposite, so that the rotation directions of the two adjacent second leaves 3224 are opposite, thereby realizing that the wind entering the second leaf 3224 is blocked in two directions, the wind amount passing through is adjusted, and the size of the opening of the second leaf 3224 can also adjust the wind amount passing through.

[0084] And by arranging two auxiliary doors, the adjustment of the wind amount passing through is increased, so as to adapt to more requirements for the ventilation amount, and the structure is simple and the cost is lower.

[0085] The soft sealing strips are arranged at the edges of the first opening 3234 and the second opening 3244.

[0086] The soft sealing strips arranged on the first opening 3234 and the second opening 3244 are also used to avoid invalid air leakage.

[0087] The flexible sealing strips are connected to the periphery of the first leaf 3214 and the second leaf 3224.

[0088] Optionally, the flexible sealing strips can be made of rubber, silica gel and the like, but are not limited thereto.

[0089] Optionally, as shown in Figs. Figure 4 and Figure 6 The elastic connecting body 312 is arranged on the left side of the main door body 310 and is suitable to be arranged in the square groove 111. The width of the elastic connecting body 312 is greater than the thickness of the passing door body 300, so as to completely fit the inner cavity of the square groove 111, so that the space in front of and behind the square groove 111 is completely separated, invalid air leakage is avoided, and the passing door body 300 is sealed.

[0090] The wind pressure sensor 410 is arranged at the upper end of the main door body 310 and is electrically connected with the wind pressure value display 420. The first secondary door and the second secondary door are adjusted according to the wind pressure value, so as to meet the ventilation requirement according to the ventilation demand.

[0091] The working process of the utility model is as follows:

[0092] Passing function: when a pedestrian needs to pass, the door handle 314 or the main door body 310 is pushed, the door handle 314 is separated from the magnetic suction arresting member, the door handle 314 or the main door body 310 is pushed to open the door and pass, so as to avoid time or energy consumption caused by opening the heavy air door; when closing, the door handle 314 or the main door body 310 is only pushed to close, so that the door handle 314 and the magnetic suction arresting member are re-attracted and fixed.

[0093] Ventilation function: according to the value displayed by the wind pressure value display 420, whether the first secondary door and the second secondary door need to be opened is judged according to different demands, the downhole ventilation is adjusted, when adjustment is needed, the first driving gear 3233 and the second driving gear 3243 are rotated to adjust the first rotating leaf 321 and the second rotating leaf 322, the downhole ventilation volume is adjusted, so as to meet the ventilation demand under different conditions.

[0094] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term " set ", " install ", " link ", " connect " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through intermediate medium indirectly connected, can be two element internal communication.For ordinary skilled person in the art, can understand the specific meaning of the above terms in the utility model according to specific circumstances.

[0095] It should be noted that like reference numerals and letters refer to like items in the several views, and once an item is defined in one view, it need not be further defined and explained in subsequent views.

[0096] The above is only preferred embodiment of the utility model, and is not used to limit the utility model, for ordinary skilled person in the art, the utility model can have various changes and changes.For any modification, equivalent replacement, improvement etc.in the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A multi-functional air door suitable for passing under a mine, characterized in that, It includes a door body, a door wall for mounting the door body and connecting it to the roadway wall, and a passage door mounted on one side of the door body and movable on the door body; The passage gate includes a main gate body, pulley assemblies installed at the upper and lower ends of the main gate body, a door handle installed on the left side of the front face of the main gate body, and an adjustable secondary door installed in the middle of the main gate body.

2. The mine passable multi-functional damper according to claim 1, characterized in that, An air door frame is installed in the inner cavity of the air door wall; the air door body is rotatably installed on the air door frame; The damper body includes a left damper body and a right damper body, and a starting cylinder is installed between the upper inner end of the left damper body and the lower end of the damper frame near the inner side of the damper body. One end of the cylinder is hinged to the door frame, and the other end is hinged to the upper inner side of the left or right door body. Both the lower right side of the left door and the lower left side of the right door are equipped with wheels that are recessed into the ground.

3. The mine passable multi-functional damper according to claim 2, characterized in that, The lower ends of the left and right doors are provided with wind deflectors, and the upper ends of the left and right doors are also provided with wind deflectors; A magnetic locking device corresponding to the door handle is installed on the upper right side of the left door body, near the main door body.

4. The mine passable multi-functional damper according to claim 3, characterized in that, A square through hole for installing the main door is provided in the middle of the left door body, and a square groove is provided on the left door body to the left of the square through hole; The width of the square groove is just enough to accommodate the main door body; The left door body is provided with pulley grooves at the upper and lower ends of the square through hole and square groove, which are suitable for the rolling of the pulley group.

5. The mine passable multi-functional damper as claimed in claim 1, wherein, The main door is a frame structure; an elastic sealing strip is installed on the left side of the main door. The adjustable secondary door includes a first secondary door installed at the front end of the main door body and a second secondary door installed at the rear end of the main door body.

6. The mine passable multi-functional damper as claimed in claim 5, wherein, The upper surface of the inner cavity of the main door body is provided with two rows of staggered upper cylindrical holes in the horizontal direction; The lower end face of the inner cavity of the main door body has two rows of staggered lower cylindrical holes corresponding to the upper cylindrical holes.

7. The mine passable multi-functional damper as claimed in claim 6, wherein, The first auxiliary door includes multiple first rotating hinges that are respectively inserted between the multiple upper cylindrical holes and the corresponding lower cylindrical holes in the same horizontal row; The second auxiliary door includes multiple second rotating hinges that are respectively inserted between the multiple upper cylindrical holes and the corresponding lower cylindrical holes in another horizontal row.

8. The mine passable multi-functional damper as claimed in claim 7, wherein, The first rotating hinge includes a first rotating shaft inserted between the upper cylindrical hole and the lower cylindrical hole, a first bearing respectively sleeved on the upper end and the lower end of the first rotating shaft, a first rotating gear sleeved on the upper end of the first rotating shaft and located below the first bearing, and a first hinge sleeved in the middle of the first rotating shaft. The second rotating hinge includes a second rotating shaft inserted between the upper and lower cylindrical holes, second bearings respectively sleeved on the upper and lower ends of the second rotating shaft, a second rotating gear sleeved on the upper end of the second rotating shaft and located below the second bearings, and a second hinge sleeved in the middle of the second rotating shaft; wherein The first rotating gear is located above the second rotating gear; adjacent first rotating gears are meshed together, and adjacent second rotating gears are meshed together. The first and second bearings located above and below are respectively installed in the upper and lower cylindrical holes.

9. The mine passable multi-functional damper as claimed in claim 8, wherein, The upper end of the first sub-door is provided with a first upper cover for covering the first rotating gear and adapted to cooperate with the upper end of the front inner cavity of the main door body; The upper end of the second sub-door is provided with a second upper cover for covering the second rotating gear and adapted to cooperate with the upper end of the rear inner cavity of the main door body; The first upper cover is of a "[ ]" type, and a first fixed rod is fixedly installed on one side of the cavity formed on the two side wings of the first upper cover; a first driving bearing is installed in the middle of the first fixed rod; a first driving gear engaged with the first rotating gear is installed on the first driving bearing; and a first opening for exposing the first driving gear is formed in the middle of the front end of the first upper cover; The second upper cover is of a "[ ]" type, and a second fixed rod is fixedly installed on one side of the cavity formed on the two side wings of the second upper cover; a second driving bearing is installed in the middle of the second fixed rod; a second driving gear engaged with the second rotating gear is installed on the second driving bearing; and a second opening for exposing the second driving gear is formed in the middle of the front end of the second upper cover; Soft sealing strips are installed on the edges of the first and second openings.

10. The mine passable multi-functional damper as claimed in claim 4, wherein, An elastic connecting body adapted to be put into the square groove is installed on the left side of the main door body.

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